(function () {
    if (!CodeMirror.modeURL) CodeMirror.modeURL = "../mode/%N/%N.js";

    var loading = {};

    function splitCallback(cont, n) {
        var countDown = n;
        return function () {
            if (--countDown == 0) cont();
        };
    }

    function ensureDeps(mode, cont) {
        var deps = CodeMirror.modes[mode].dependencies;
        if (!deps) return cont();
        var missing = [];
        for (var i = 0; i < deps.length; ++i) {
            if (!CodeMirror.modes.hasOwnProperty(deps[i]))
                missing.push(deps[i]);
        }
        if (!missing.length) return cont();
        var split = splitCallback(cont, missing.length);
        for (var i = 0; i < missing.length; ++i)
            CodeMirror.requireMode(missing[i], split);
    }

    CodeMirror.requireMode = function (mode, cont) {
        if (typeof mode != "string") mode = mode.name;
        if (CodeMirror.modes.hasOwnProperty(mode)) return ensureDeps(mode, cont);
        if (loading.hasOwnProperty(mode)) return loading[mode].push(cont);

        var script = document.createElement("script");
        script.src = CodeMirror.modeURL.replace(/%N/g, mode);
        var others = document.getElementsByTagName("script")[0];
        others.parentNode.insertBefore(script, others);
        var list = loading[mode] = [cont];
        var count = 0, poll = setInterval(function () {
            if (++count > 100) return clearInterval(poll);
            if (CodeMirror.modes.hasOwnProperty(mode)) {
                clearInterval(poll);
                loading[mode] = null;
                ensureDeps(mode, function () {
                    for (var i = 0; i < list.length; ++i) list[i]();
                });
            }
        }, 200);
    };

    CodeMirror.autoLoadMode = function (instance, mode) {
        if (!CodeMirror.modes.hasOwnProperty(mode))
            CodeMirror.requireMode(mode, function () {
                instance.setOption("mode", instance.getOption("mode"));
            });
    };
}());
